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Finding the Fourth Proportional to 1,413.25, 1,950.48 and 815.87

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Solution

The fourth proportional to 1,413.25, 1,950.48 and 815.87 is: 1,126.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.25 : 1,950.48 = 815.87 : x
  2. Step 2: Convert to fraction form
    1,413.25/1,950.48 = 815.87/x
  3. Step 3: Cross multiply
    1,413.25x = 1,950.48 × 815.87
  4. Step 4: Simplify right side
    1,413.25x = 1,591,342.99
  5. Step 5: Solve for x
    x = 1,591,342.99/1,413.25
  6. Step 6: Final answer
    x = 1,126.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.